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TI-2026-82039 Aliases CVE-2026-103408GHSA-mg6q-7pjx-486r

Stack buffer overflow in Juniper Session Smart Router DHCP client

Priority MEDIUM 40CWE-121Published · Updated

Key facts

Attack vector
Adjacent network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.

Summary

Juniper Networks Session Smart Router from 0 before 7.0.5, from 7.1.0 before 7.1.7, and from 7.2.0 before 7.2.3 are affected. A stack buffer overflow in the DHCP client lets an unauthenticated attacker on the local network achieve remote code execution by sending a malicious DHCP reply (CWE-121).

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

A Stack Buffer Overflow vulnerability in the DHCP client in Juniper Networks Session Smart Router allows an unauthenticated attacker on the local network to achieve remote code execution via a malicious DHCP reply.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00309 23rd percentileScored 2026-11-07
Fix Fixed Session Smart Router (Juniper Networks): 7.0.5, 7.1.7, 7.2.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
JuniperSession Smart Routerbefore 7.0.5; 7.1.0 to before 7.1.7; 7.2.0 to before 7.2.37.0.5, 7.1.7, 7.2.3Patch availableCNA
  • Session Smart Router VendorJuniper Affected before 7.0.5; 7.1.0 to before 7.1.7; 7.2.0 to before 7.2.3 Fixed in 7.0.5, 7.1.7, 7.2.3 Patch available CNA

Remediation

Upgrade Session Smart Router to fixed versions 7.0.5, 7.1.7 or 7.2.3 for the respective release lines.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA Session Smart Router (Juniper Networks) Fixed in 7.0.5, 7.1.7, 7.2.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Juniper Networks Session Smart Router — supportportal.juniper.net/JSA112183

    16 records Highest priority Priority MEDIUM 5 MEDIUM, 11 LOW

    Other records, highest priority first

    • TI-2026-82040 Missing authentication in Juniper Session Smart Router grants admin accessPriority MEDIUM 49
    • TI-2026-82044 OS command injection in Juniper Session Smart Router and ConductorPriority MEDIUM 42
    • TI-2026-82034 OS command injection in Juniper Session Smart Router and ConductorPriority MEDIUM 42
    Show all 16 records → Advisory →

Timeline

  1. 2026-10-28 Threatist record created from CVE-2026-103408
  2. 2026-10-28 Alias added: GHSA-mg6q-7pjx-486r
  3. 2026-10-30 Priority changed: MEDIUM → LOW
  4. 2026-11-06 CISA SSVC decision points changed
  5. 2026-11-06 Priority changed: LOW → MEDIUM

References

Advisory 1

  • TI-2023-18638 Junos OS: EX and SRX Series: A PHP vulnerability in J-Web allows an unauthenticated to… KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-01585 Out of Cycle Security Advisory: Junos OS: Security vulnerability in J-Web and web based (HTTP/HTTPS) services KEVCVSS 3.1CRITICAL 9.8
  • TI-2015-06436 Juniper ScreenOS 6.2.0r15 through 6.2.0r18, 6.3.0r12 before 6.3.0r12b, 6.3.0r13 before… KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-20885 Apache Commons Text prior to 1.10.0 allows RCE when applied to untrusted input due to insecure interpolation defaults CVSS 3.1CRITICAL 9.8
  • TI-2015-04610 Assertion failure in ISC BIND named via TKEY queries KEVCVSS 3.1HIGH 7.5
  • TI-2025-15550 Junos OS: An local attacker with shell access can execute arbitrary code KEVCVSS 4.0MEDIUM 6.7
See all 1284 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences